INSPECTION PROCEDURE 2: The Windshield Wipers Do Not Work When The Wiper Switch Is At The "INT", "Washer" Or "Mist" Position. However, The Wipers Work At Low Speed When The Switch Is At The "Lo" Or "Hi" Position: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: V.C.I.
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

1. STEP 1. Use the scan tool MB991958 to check if an ETACS-related diagnostic trouble code is set. 

   Connect the scan tool. Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."

   Q: Is the diagnostic trouble code set? 

   • YES:  Diagnose the ETACS-ECU. Refer to "DIAGNOSTIC TROUBLE CODE CHART ."
   • NO:  Go to Step 2.
     Fig 1: Connecting Scan Tool To Data Link Connector

     Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, check data list. 

   Check the input signal related to the windshield wiper operation.

   • Ignition switch: ACC
   • Operate the windshield wiper switch at each switch position.
     WINDSHIELD WIPER SWITCH POSITION
     
     

     Item No.	Item name	Windshield wiper switch position	Normal condition
     Item 235	Front wiper ACT	LO	ON
     		HI
     		AUTO	ON and OFF
     		INTO	ON and OFF
     		MIST	ON
     Item 236	Front wiper Lo/Hi	LO	OFF
     		HI	ON
     		AUTO	OFF
     		INTO	OFF
     		MIST	ON

     OK: Normal condition is displayed. 

     Q: Is the check result normal? 

     • YES:  Go to Step 3.
     • NO:  Troubleshoot the ETACS-ECU. Refer to INSPECTION PROCEDURE 11: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE COLUMN SWITCH SIGNAL .
3. STEP 3. Retest the system. 

   Check that the windshield wipers work normally.

   Q: Is the check result normal? 

   • YES:  Intermittent malfunction. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
   • NO:  Replace the ETACS-ECU.